Before you make your own projects, you should learn the basics on modelling of structure and loads from tutorials B1 and B2. Tutorial B3 will give you a quick introduction on how to do member code checking.
You could also challenge yourself on doing a very small helideck design including one design iteration based on member code checking. In the example below the section properties are set to fail initially so you can learn how to do re-design (change properties and see effect on code check result based on existing structural analysis results) and a full design iteration (update analysis model, run analysis and code check).
The task at hand is to make a helideck as follows. Detailed instructions can be found in the videos.
The main dimensions and the section properties are shown below. The material to be used is steel and has yield limit of 355 MPa.
Fig. 14 3-D Model of Helideck
Stiffener Spacing
Fig. 15 Plan View of Helideck
The loads
There shall be a gravity loadcase (g=-9.81 m/sec2) and a helicopter at two different positions.
The helicopter shall be modelled as an equipment with 3 footprints. The size of the equipment is 3 m tall, 15 m long and 4 m wide with a mass of 20 tonnes. The footprint has the following dimensions
Fig. 16 Helicopter load modelled as Equipment and footprint appreciate
The positions (cog of equipment) of the helicopter are:
Position 1 at x=12.5m, y=8.25m, z=0m
Fig. 17 Helicopter load at position 1 on beams
Position 2 at x=9 m, y=12.5m, z=0m
Fig. 18 Helicopter load at position 2 on beams
Combine the gravity load with helicopter positions and use scaling factors 1.3 and 5 respectively.
Perform a linear structural analysis followed by a member code check using ISO 19902 revision 2020.
Finally, do a re-design of failing members before a design iteration is done to ensure consistency between structural model and code check model.
The result of your project should look like this if you follow the steps of the videos.
Fig. 19 Final code check results of beams after design iterations
